Presser-foot



(No Model.)

T.F.H.A YP.T. PRBSSER FOOT.

No. 331,788. Patented Dec. 8,11885.

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ilNiTnD STATES PATENT @einen THOMAS F. HART, OF LYNN, MASSACHUSETTS.

PRESSE R-FOOT.

SPECIFICATION forming part o1 Letters Patent No. 331,788, dated December8, 1885.

Application filed March 25, 1835.

To all whom t may concern:

Be it known that I, THoMAs F. HART, a citizen of the United States,residing at Lynn, in the county of Essex and State of Massachusetts,haveinvented certain new and useful Improvements in Presser-Feet; and Ido hereby declare that the same are fully described in the followingspecication and illustrated in the accompanying drawings.

This invention relates to improvements in presser-feet forsewing-machines of the kind used for sewing seam-stays to boots andshoes,A and it is carried out as follows, references being had to theaccompanying drawings, where- Figure l represents a side elevation of myimproved presserfoot. Fig. 2 represents a plan view, seen from the top,with the yield ing spring shown as removed. Fig. 3 represents a bottomview of the invention, and Fig. 4 represents a cross-section on thelineA B shown in Fig. l.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings.

In presser-feet of the usual kind for this purpose there has been adownwardly-projecting rib made rigid in one piece with the lowerhorizontal part of the presser-foot, such rib being adapted to enter thehollow at the junction of the two'pieces of leather previously closedtogether so as to serve as a guide for sewing on the stay to theunderside of the work and parallel to the center seam. Such rigid ribis, however, objectionable, for the reason that it is liable to tear thethread in the middle seam, and to avoid such difficulty I make the saidrib as a separate part from the presser-foot and hinge it to the latterin such a manner that its lower edge is permitted to play in a slit madein the horizontal part ofthe presser-foot and held downward with ayielding pressure against the iniiuence of a suitable spring, and inthis manner the said/rib is made to yield automatically to inequalitiesin the surface of the seam, as well as preventing the latter from beingcut or injured by the downwardly-projecting rib. In connection with suchvertically-yielding rib,

5o I have arranged a laterally-adj asta-ble needle- Serial No. l0,064.(No model.)

"1 guide, against the inclined side of which the needle is made to restwhile inthe act of penetrating the material, and thus preventoscillation or trembling of the needle, by which uneven work isproduced.

In the drawings, c is the presserfoot of the usual form, and a. is theslit in its horizontal part, as described.

a a are ears secured to the piesseifoot c, as shown, to which ears ishinged the yielding arm b, the under side of which is made as adownwardly -projecting rib, b, that passes loosely through the slit a',as shown in Fig. 4E. The arm or lever Z) is held downward by means of asuitable spring, c, secured at its upper end to presserfoot a, andhaving its lower free end resting on top of lever b, as shown in Fig. l.

c3 is the perforation in the horizontal portion of the presser-foot, asusual, for the needle c4 to pass through, as shown in Fig. 4.

To one side of yielding lever b is secured at d the spring-bar d, havingin its forward end, opposite to the needle-hole a3 and needle a4, thetapering projection d, against which the needle rests lightly while inthe act of passing through the fabric, and thus serves as a guide forthe needle to rest against, and thus prevent its oscillation ortrembling, for the purpose set forth. For the purpose of adjusting saidprojection "in a lateral direction toward tional resistance, I employ asmall set-screw, d3, screwed through the rear side of yielding bar b,and having its pointed end preferably resting in a countersink or recesson the back of spring-bar d or the projection d, as shown in Fig. 2.

The under side of the presser-foot a may be concave or dat, as may bedesired.

Having thus fully described the nature and construction of my invention,I wish to secure by Letters Patent and claim- 1. The slittedpresser-foot a a and its hinged yielding bar b and guiderib b, incombination with the laterally adjustable needle-guide d d", as and forthe purpose set `forth.

2. In a presser-foot, the vertically-yielding the needle, so as toobtain the proper fricguide-rib b', in combination with the latericoally-adjustable needle-guide d, as and for the toward the neeille, asand for the purpose set purpose'set forth. forth. A 1o 3. Incombination, the presser-foot a, its In testimony whereofhave afxed mysigslit a, the hinged yielding lever I), and its rib nature in presenceof two Witnesses.

5 b, the spring c, and springbar d, secured in THOMAS F. HART.

one end to bal' b, and having the inclined Witnesses: needle'guide d,and regulating-screw d3, by ALBAN ANDRN,

means of which it may be adjusted laterally HENRY OHADBOURN.

